I wrote:
The student timeshare systems my high school used (running the McGill University MUSIC operating system) while I was a student there (an IBM 370/135 at the District Office) and shortly after I graduated (an on-site IBM 4341) used Merlin drives.
to which Tomas replied:
Those times, high schools and unis built their own OSes. These day they even outsource "programming" web pages. Way to go :-(
McGill MUSIC still exists, actually. http://webpages.mcgill.ca/staff/group3/dedwar1/web/msi/musicsp.htm -- JHHL